I've wondered the same thing. I've gopro'ed 3 sessions now, pressing record and letting it go until the battery runs out. So I have 2 or more hours of footage that takes up a whole lot of space....
You need to get the remote control. Then you will find that you only turn the camera on when you are entering an interesting point of your session. Or you switch between video and stills (the stills are much crisper, colorful, and easier to edit).
Do that, and you'll end up with a LOT less wasted footage. It also becomes a much less intimidating pile of crap so you are more likely to take the time to edit it into a flick.
Some of my movies get a lot of views, some of them get very few. I do it for myself, family and friends. To remember a session. And because it is fun to produce little movies. If a movie starts being more work than fun, I put it aside. I only edit the footage that motivates me to get something out there. It also helps to practice on all these little sessions or life events so that when you have recorded something that you are really proud of, you have the editing skills to piece it together! For example, I have made a dozen mediocre flicks of my own boarding sessions, but then when I want to make a movie of my kids doing something, I get the real pay-off.